//
// "$Id: table-as-container.cxx 9728 2012-11-20 18:32:59Z greg.ercolano $"
//
//	Show how FLTK widgets can be parented by Fl_Table. -erco 03/30/2003
//
//	Originally the 'widgettable.cxx' example program that came with 
//	erco's Fl_Table widget. Added to FLTK in 2010.
//
//	This demonstrates how to use Fl_Table as a 'container' for FLTK
//	widgets; one widget per cell. This isn't optimal for large tables,
//	where it's better to make one instance of a widget, and move it to
//	where it's needed. For an example of this, see the example program
//	"table-spreadsheet.cxx".
//
// Copyright 2010 Greg Ercolano.
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems to:
//
//     http://www.fltk.org/str.php
//

#include <stdio.h>
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Light_Button.H>
#include <FL/Fl_Input.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Table.H>

void button_cb(Fl_Widget* w, void*);

//
// Simple demonstration class deriving from Fl_Table
//
class WidgetTable : public Fl_Table {
protected:
	void draw_cell(TableContext context,  		// table cell drawing
		int R = 0, int C = 0, int X = 0, int Y = 0, int W = 0, int H = 0);

public:
	WidgetTable(int x, int y, int w, int h, const char* l = 0) : Fl_Table(x, y, w, h, l) {
		col_header(1);
		col_resize(1);
		col_header_height(25);
		row_header(1);
		row_resize(1);
		row_header_width(80);
		end();
	}
	~WidgetTable() { }

	void SetSize(int newrows, int newcols) {
		clear();		// clear any previous widgets, if any
		rows(newrows);
		cols(newcols);

		begin();		// start adding widgets to group
		{
			for (int r = 0; r < newrows; r++) {
				for (int c = 0; c < newcols; c++) {
					int X, Y, W, H;
					find_cell(CONTEXT_TABLE, r, c, X, Y, W, H);

					char s[40];
					if (c & 1) {
						// Create the input widgets
						sprintf(s, "%d.%d", r, c);
						Fl_Input* in = new Fl_Input(X, Y, W, H);
						in->value(s);
					}
					else {
						// Create the light buttons
						sprintf(s, "%d/%d ", r, c);
						Fl_Light_Button* butt = new Fl_Light_Button(X, Y, W, H, strdup(s));
						butt->align(FL_ALIGN_CENTER | FL_ALIGN_INSIDE);
						butt->callback(button_cb, (void*)0);
						butt->value(((r + c * 2) & 4) ? 1 : 0);
					}
				}
			}
		}
		end();
	}
};

// Handle drawing all cells in table
void WidgetTable::draw_cell(TableContext context,
	int R, int C, int X, int Y, int W, int H) {
	switch (context) {
	case CONTEXT_STARTPAGE:
		fl_font(FL_HELVETICA, 12);		// font used by all headers
		break;

	case CONTEXT_RC_RESIZE: {
		int X, Y, W, H;
		int index = 0;
		for (int r = 0; r < rows(); r++) {
			for (int c = 0; c < cols(); c++) {
				if (index >= children()) break;
				find_cell(CONTEXT_TABLE, r, c, X, Y, W, H);
				child(index++)->resize(X, Y, W, H);
			}
		}
		init_sizes();			// tell group children resized
		return;
	}

	case CONTEXT_ROW_HEADER:
		fl_push_clip(X, Y, W, H);
		{
			static char s[40];
			sprintf(s, "Row %d", R);
			fl_draw_box(FL_THIN_UP_BOX, X, Y, W, H, row_header_color());
			fl_color(FL_BLACK);
			fl_draw(s, X, Y, W, H, FL_ALIGN_CENTER);
		}
		fl_pop_clip();
		return;

	case CONTEXT_COL_HEADER:
		fl_push_clip(X, Y, W, H);
		{
			static char s[40];
			sprintf(s, "Column %d", C);
			fl_draw_box(FL_THIN_UP_BOX, X, Y, W, H, col_header_color());
			fl_color(FL_BLACK);
			fl_draw(s, X, Y, W, H, FL_ALIGN_CENTER);
		}
		fl_pop_clip();
		return;

	case CONTEXT_CELL:
		return;		// fltk handles drawing the widgets

	default:
		return;
	}
}

void button_cb(Fl_Widget* w, void*) {
	fprintf(stderr, "BUTTON: %s\n", (const char*)w->label());
}

int main() {
	Fl_Double_Window win(940, 500, "table as container");
	WidgetTable table(20, 20, win.w() - 40, win.h() - 40, "FLTK widget table");
	table.SetSize(50, 50);
	win.end();
	win.resizable(table);
	win.show();
	return(Fl::run());
}

//
// End of "$Id: table-as-container.cxx 9728 2012-11-20 18:32:59Z greg.ercolano $".
//
